Improvement in automatic cut-off gas-burnebs



J. .B. SMITH. AUTOMATIC GUT-OPP GAS BURNER.

No. 74,440. P4444444 Pb. 11, 1868.

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' I Letters Patent No. 74,440, dated February 11, 1868 IMPROVEMENT IN AUTOMATIC GUT-OFF GAS-BURNERS.

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TO ALL WHOM I1 MAY CONCERN:

Be it known that I, JOHN B. SMITH, of Pittston, in the county of Luzerne, and State of Pennsylvania, have invented certain new and uscful'Improvements in Automatic Gas Cut-Oil Burners; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Figure 1, in the annexed drawings, represents a side elevation of my automatic cut-oil gas-burnor, and Figure 2 is a vertical section of the same. I

v The nature of this invention consists, first, in the employment of a metal rod, so arranged in-conneotion with other devices hereinafter described ns to automatically shut off the flow of gas when the Home is blown out; and, second, in the employment of an adjustable screw, inside of the pipe, for regulating the flow of gas, substantially as hereinafter set forth,

A represents a short metal pipe, with the bulb B in the centre. Into one end of said pipe a female screw is cut for the purpose of. attaching it to a common gas-pipe. In this pipe is screwed the adjusting-screw w, which is designed to regulate the flow of gas by allowing the stem 11 more or less play. The bulb B is made hollow, and is furnished at top withfth'e' shoulder c, on which is designed to rest the commonfixture for supporting a glass globe. g and 71 represent two arms, connected at bottom with the circular nut m. n designotes a gas-burner, which screws through nut in, through shoulder e, and into bulb B, (see fig. 2.) d represents a stem, which passes through the pipe A and bullrB as far as the point t,'where it takes the form 'of the valve 8, and shuts oif the gas when required. Near the'opposite end of stem at is adjusted the cylindrical rubber or metal spring I, which extends inward to the circumference of bulb I K represents a. lever, having its fulcrum at the top of arm h. The short arm of lever K and the top of arm 9 are connected together by the iron rodf, which may be made of steel, iron, ornny other expansive material, the said rod being riveted to the upper end of arm h, and resting at the other end one shoulder in K. Lever K extends down below the stem (Land is'dcsigned to act upon said stem, as hereinafter described. It will he observed that when the valve 8 is in the position represented by fig. 2, it fits a circular cavity inside of pipe A, and opposite the point t, and thus prevents the gas from entering through bulb B into burn-er u. It becomes necessary, then, in' order to admit the gas into the'burner u, to press against the lower end ofllever'K with the thumb, and by this operation force the valve s-hcyond the point t, where the bore of the pipe is suilicientlyenlarged to allow the gas to pass around the circumference'of valve .9 into' the bulb B and humor it. It will be necessary, after the gas is lit, to continue the pressure on stem d for a few seconds, until the rod becomes heated, and by its expansion forces out the short arm 'oflever K, and causes the long arm of said lever to press against the 3150111 (Z, and thus keep the valves in position to admit the constant flow-of gas to the burner. On the other hand, should the gas be blown out, as it sometimes happens, the rod will in a few seconds'contract sufliciontly to draw in the short arm of lever K, and the pressure of the long arm being removed from the end of stem d, the spring I will act on stem d and valve 8, so as to close the opening through which thegns was admitted into the burner u, and thus automatically cut-off the flow of gas; or, if'the gas should only be partially turncd of, so that the flame will not impinge rodf, a like result will also follow.

Having thus described my invention,-lwhat I claim, and desire to secure by Letters Patent, is. i 1. The rodf, so arranged as to automatically cut off the dew of gas, substantially in the manner herein set forth.

2-. In combination with the above, I claim lever K, substantially as and for the purpose set forth,

3. Stem d, in combination with lever K, substantially in the manner specified.

4. I claim pipe A, provided with bulb B, or any equivalent device, in combination-with stem d, lever K, 'and rod f, substantially as and for the purpose described.

In testimony that claim the foregoing as my own, I afiix my signature, in presence of two witnesses.

, JOHN B. SMITH. Witnesses:

, vEl. H. ALEXANDER, C. ALEXANDER. 

